Catch,
The fuel display is constantly monitored as, together with a "time remaining" crib on my kneeboard, I need to be able keep the crew informed of how much time we have remaining on task.
The 135 fuel display is clear and easy to read by itself but it is part of a system. The system has warnings built in to it which have been described many times on this and the 135 thread. The fuel display is essentially an airborne planning tool. However, should the warnings appear, expected or not, the clock becomes the primary planning tool.
To quote an old and bald QHI from my military days, "Airspeed is life, altitude is life insurance and you cannot buy either of them without fuel".
Art,
if the TX pump captions were on then they remain on once the pumps are turned off.